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    Subject[PATCH 5.4 248/355] drm/amdgpu/gmc6: fix DMA mask from 44 to 40 bits
    Date
    From: Alex Deucher <alexander.deucher@amd.com>

    [ Upstream commit 403475be6d8b122c3e6b8a47e075926d7299e5ef ]

    The DMA mask on SI parts is 40 bits not 44. Copy
    paste typo.

    Fixes: 244511f386ccb9 ("drm/amdgpu: simplify and cleanup setting the dma mask")
    Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1762
    Acked-by: Christian König <christian.koenig@amd.com>
    Tested-by: Paul Menzel <pmenzel@molgen.mpg.de>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
    index 9fb1765e92d15..e9f5de35f7953 100644
    --- a/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
    +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
    @@ -863,12 +863,12 @@ static int gmc_v6_0_sw_init(void *handle)

    adev->gmc.mc_mask = 0xffffffffffULL;

    - r = dma_set_mask_and_coherent(adev->dev, DMA_BIT_MASK(44));
    + r = dma_set_mask_and_coherent(adev->dev, DMA_BIT_MASK(40));
    if (r) {
    dev_warn(adev->dev, "amdgpu: No suitable DMA available.\n");
    return r;
    }
    - adev->need_swiotlb = drm_need_swiotlb(44);
    + adev->need_swiotlb = drm_need_swiotlb(40);

    r = gmc_v6_0_init_microcode(adev);
    if (r) {
    --
    2.33.0


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